Packaging blank and package for manufacturing a sealed package

Abstract

This invention describes a packaging blank (2, 2', 2'', 2''') comprising: a base layer (3) for providing rigidity; a plurality of laminated layers (4) applied to the base layer (3) and covering both sides thereof; an opening (9) formed by a through groove provided in the base layer (3); and a separator film (10) covering the opening. The opening (9) extends along a first axis (F) and a second axis (G) perpendicular to the first axis (F). A first extension length (E1) of the opening (9) along the first axis (F) is greater than a second extension length (E2) along the second axis (G). The opening (9) includes a first end (17) and a second end (18) spaced apart from each other along the first axis (F), a first weakening line (11), and a second weakening line (12). Both the first weakening line (11) and the second weakening line (12) extend outward from the opening (9).

Description

Technical Field

[0001] This invention relates to a multi-layer sheet packaging material for producing packaging for pourable products (especially pourable food).

[0002] In addition, the present invention relates to packaging for pourable products (especially pourable food). Background Technology

[0003] As is well known, many pourable foods, such as fruit juice, ultra-high temperature (UHT) milk, wine, and ketchup, are sold in packages made of sterile packaging materials. A typical example is the rectangular packaging used to contain pourable foods, namely Tetra Pak (a registered trademark), which is made by folding and sealing laminated strip packaging material. This packaging material has a multi-layered structure, including a base layer (e.g., paper) covered on both sides by heat-sealable plastic layers (e.g., polyethylene). For aseptic packaging of products intended for long-term storage, such as UHT milk, the packaging material includes an oxygen barrier material (e.g., aluminum foil) that covers a heat-sealable plastic material, and is then covered by another heat-sealable plastic material, forming the inner surface of the packaging that ultimately comes into contact with the food. Such packaging is typically produced by fully automated packaging machines, on which a continuous tube is formed from a conveyed roll of packaging material. The roll of packaging material is sterilized on the machine, for example, by applying a chemical sterilizing agent (such as hydrogen peroxide solution). Once sterilized, the sterilizing agent is removed from the surface of the packaging material, for example, by heating and evaporation. The sterilized roll is then placed in a closed, sterile environment and folded longitudinally and sealed to form a tube, which is then conveyed vertically. To complete the forming process, sterilized or aseptically treated food is filled into the tube, the tube is sealed, and then cut along equally spaced cross-sections; this yields a pillow-shaped package, which is then mechanically folded to form the corresponding finished package. Alternatively, the packaging material can be cut into blanks, shaped into a package on a forming mandrel, and then the food is filled and sealed. An example of this type of packaging is the so-called "gable box" packaging, marketed under the trade name Tetra Rex (registered trademark).

[0004] To open these packages, they typically feature a removable section that partially separates from the rest of the packaging material via an opening mechanism, creating a pouring spout for dispensing the product. This removable section is usually formed on the packaging material before it is folded and sealed to form the finished package.

[0005] The peelable portion typically contains so-called "pre-laminated" holes, which are holes that penetrate only the base layer of the packaging material. These holes are covered by heat-sealable plastic layers and barrier material layers during lamination, and these layers are bonded together at the holes. The "pre-laminated" holes are usually circular, but other shapes are foreseeable, as disclosed in patent documents EP-A-2287082 and EP-A-3260386 under the name of Tetra Laval.

[0006] Typically, the packaging includes an opening device comprising: a frame defining a discharge port and mounted around a removable portion of the packaging; a removable cap, for example, threadedly connected to the outside of the frame to close the discharge port; and a substantially tubular cylindrical cutter threadedly connected inside the frame and configured to puncture the removable portion upon initial opening of the packaging. Such opening devices are typically made of plastic.

[0007] Recent research has focused on reducing plastic consumption in order to improve the sustainability of packaging.

[0008] In particular, the research also focuses on providing reusable opening devices that can be used multiple times on multiple packages. In this case, the opening device is not pre-installed on the packaging. The consumer has the opening device at hand, which is considered to be usable with different packages. Specifically, the consumer first needs to attach the opening device to the package, then pour out the pourable product; after the package is emptied, the opening device is removed for reuse on another package.

[0009] Therefore, it is deemed necessary to provide packaging suitable for receiving reusable opening devices. In particular, there is a need for packaging with an opening covered by a separator film that can tightly receive reusable opening devices, so that liquid products do not drip along the edges of the packaging when poured out.

[0010] In addition, there is a need to provide a package with an opening covered by a separator to receive a reusable opening device, wherein the opening can be cleanly cut by the cutter of the opening device without leaving any rough edges that would affect the pouring out of the food.

[0011] In addition, there is a need to provide a package having an opening covered with a separator film to receive a reusable opening device, wherein the opening, together with the separator film, will not be accidentally broken during the storage and transportation of the package. Summary of the Invention

[0012] Therefore, the object of the present invention is to provide a packaging blank for producing sealed packaging of pourable products (especially pourable food), which overcomes one or more of the above-mentioned disadvantages.

[0013] Another object of the present invention is to provide a package for a pourable product, particularly a package for a pourable food, which overcomes one or more of the above-mentioned disadvantages.

[0014] The packaging blank and packaging as described in the appended claims fully achieve the above-mentioned objectives. Attached Figure Description

[0015] Four non-limiting embodiments of the invention will be described by way of example with reference to the accompanying drawings, wherein: Figure 1 A cross-sectional view of the packaging blank according to the present disclosure is shown; Figure 2 A packaging blank according to a first embodiment of the present invention is shown; Figure 3 The invention is illustrated according to a first embodiment and is provided by Figure 2 Packaging made from the packaging blank shown; Figures 4A to 4C It shows the use of an opening device to Figure 3 The process of perforating the packaging shown; Figure 5 A packaging blank according to a second embodiment of the present invention is shown; Figure 6 A second embodiment of the present invention is shown, and is provided by Figure 5 Packaging made from the packaging blank shown; Figure 7 A packaging blank according to a third embodiment of the present invention is shown; Figure 8 A package according to a third embodiment of the present invention is shown, the package being made of Figure 7 The packaging blank shown is made from the material. Figure 9 A packaging blank according to a fourth embodiment of the present invention is shown; and Figure 10 A package according to a fourth embodiment of the present invention is shown, the package being made of Figure 9 The packaging blank shown is made from the material. Detailed Implementation

[0016] The elements and features shown in the various preferred embodiments (including the accompanying drawings) can be combined with each other without exceeding the scope of protection described below in this application.

[0017] Figure 3 The number 1 in the text indicates a package filled with a pourable product (preferably a pourable food, such as pasteurized milk, milk, dairy products, drinking yogurt, yogurt drinks, beverages, juices, wine, ketchup, salt, sugar, etc.).

[0018] More specifically, packaging 1 can be made of, for example Figure 2 The packaging blank 2 shown is made from the packaging blank shown.

[0019] More specifically, each package 1 can be made from the corresponding packaging blank 2 by an automatic packaging machine.

[0020] The automatic packaging machine can be configured to use the corresponding packaging blank 2 to make a package 1 and fill the package 1 with a pourable product.

[0021] like Figure 1 As shown, the packaging blank 2 has a multi-layer structure.

[0022] More specifically, each packaging blank 2 includes at least one base layer 3 (particularly a fibrous material layer, such as a paper or cardboard layer) and at least two laminates 4, particularly heat-sealing plastic material (such as polyethylene) layers 4, with the base layer 3 sandwiched between the laminates 4, the laminates 4 being connected to and covering the base layer 3.

[0023] The base layer 3 imparts rigidity to the packaging blank 2.

[0024] One of the two laminated layers 4 defines the inner surface of the corresponding package 1 formed from the corresponding packaging blank 2, which ultimately comes into contact with the pourable product.

[0025] Preferably, but not necessarily, each packaging blank 2 may also include a gas-barrier and light-blocking material layer 5 (e.g., aluminum foil or ethylene-vinyl alcohol (EVOH) film) as an additional lamination layer, specifically disposed between one of the lamination layers 4 and the base layer 3. Preferably, but not necessarily, the packaging blank 2 may also include another lamination layer 4 connected to the gas-barrier and light-blocking material layer 5.

[0026] Packaging blank 2 can be provided in the form of rolls.

[0027] More specifically, the roll material may consist of multiple packaging blanks 2 arranged in sequence.

[0028] In other words, these sequentially arranged packaging blanks 2 define multiple repeating units of the roll material. In particular, each repeating unit (i.e., the corresponding packaging blank 2) constitutes a precursor to a corresponding package 1.

[0029] Preferably, the packaging machine can be configured to produce packages 1 from rolls of material, such that each package 1 originates from a corresponding packaging blank 2.

[0030] Specifically, each packaging blank 2 may contain the desired pattern / decoration.

[0031] Alternatively, each packaging blank 2 may be provided as a single packaging blank.

[0032] Special Reference Figure 3 The package 1 may extend along the longitudinal axis A, and preferably also along a first transverse axis B perpendicular to the longitudinal axis A and a second transverse axis C perpendicular to the longitudinal axis A and the first transverse axis B.

[0033] Advantageously, the length (i.e. dimension) of package 1 along longitudinal axis A may be greater than its corresponding length (i.e. corresponding dimension) along first transverse axis B and second transverse axis C.

[0034] For more details, see [link to relevant documentation]. Figure 3 The package 1 may include a bottom wall 6 and a top wall 7 spaced apart from each other along the longitudinal axis A.

[0035] Specifically, the longitudinal axis A is perpendicular to the bottom wall 6.

[0036] The bottom wall 6 and the top wall 7 may be parallel to each other. Alternatively, the top wall 6 may be inclined relative to the bottom wall 6.

[0037] In addition, the package 1 may also include a side wall 8 that extends between (and is connected to) the bottom wall 6 and the top wall 7.

[0038] More specifically, the bottom wall 6 can be defined as a wall in the package 1 that has a substantially planar shape and is substantially perpendicular to the longitudinal axis A.

[0039] The bottom wall 6 can be configured to be placed on a supporting surface, such as the supporting surface of a shelf, refrigerator, table, workbench or similar object.

[0040] When package 1 is placed on the support surface (and in its nominal position, i.e., when the user uses it as intended), the bottom wall 6 is in contact with the support surface, while the top wall 7 is at a certain distance from the support surface.

[0041] In addition, the side wall 8 can be the part that the user holds when pouring the pourable product from the package 1.

[0042] Reference Figure 1 The package 1 includes an opening 9, which is specifically provided on the top wall 7 and configured to allow the pourable product to be poured out of the package 1.

[0043] Specifically, opening 9 is defined by a through-hole in the base layer 3.

[0044] Opening 9 is covered by a separator membrane 10.

[0045] Specifically, the separator membrane 10 needs to be ruptured before the first pouring operation.

[0046] Preferably, the separator 10 may be defined by a portion of the packaging material, particularly by a portion of one or more packaging material layers that are different from the base layer 3.

[0047] Specifically, the separator 10 may be defined by a portion of the laminate 4 and / or the barrier material layer 5.

[0048] More specifically, the opening 9 and the separator 10 together define the pre-laminated opening 9.

[0049] Reference Figures 3 to 4C The packaging 1 (especially the top wall 7) includes a first weakening line 11 and a second weakening line 12.

[0050] Specifically, as will be explained in more detail below, the opening 9, the separating membrane 10, the first weakening line 11, and the second weakening line 12 are designed to allow the opening device 13 (see below) to be opened. Figures 4A to 4C It can pierce the packaging 1 (especially the top wall 7) and be fixed to the packaging 1 (especially the top wall 7).

[0051] Specifically, the opening 9, the separator 10, the first weakening line 11, and the second weakening line 12 define the breakable area of ​​the package 1. More specifically, the opening 9, the separator 10, the first weakening line 11, and the second weakening line 12 are configured such that when the opening device 13 interacts with the top wall 7 in the breakable area, it causes the separator 10 to rupture and the packaging material to break along the first weakening line 11 and the second weakening line 12.

[0052] In addition, the packaging blank 2 also includes an opening, a separator film, a first weakening line, and a second weakening line. Since the opening 9, separator film 10, first weakening line 11, and second weakening line 12 of the packaging 1 originate from the opening, separator film, first weakening line, and second weakening line, respectively, we will use the same numbers to refer to these features on both the packaging 1 and the packaging blank 2 below. Furthermore, for the sake of brevity, we will only describe the specific details of the opening 9, separator film 10, first weakening line 11, and second weakening line 12 once; unless otherwise stated, these specific details apply to both the packaging blank 2 and the packaging 1.

[0053] More specifically, the opening 9 extends along the first axis F and the second axis G perpendicular to the first axis F.

[0054] More specifically, the first extension length E1 of the opening 9 along the first axis F is greater than the second extension length E2 along the second axis G.

[0055] Preferably, the opening 9 is symmetrical with respect to the axis of symmetry parallel to the first axis F and / or the axis of symmetry parallel to the second axis G.

[0056] The opening 9 includes a first end 17 and a second end 18 that are spaced apart from each other along the first axis F.

[0057] Furthermore, each of the first weakening line 11 and the second weakening line 12 includes its own first terminal portion 19 and 19', and its own second terminal portion 20 and 20' opposite to its own first terminal portion 19 or 19'.

[0058] More specifically, the first terminal portion 19 of the first weakening line 11 is positioned adjacent to the first end 17, particularly at the first end 17; while the first terminal portion 19' of the second weakening line 12 is positioned adjacent to the second end 18.

[0059] Furthermore, both the first weakening line 11 and the second weakening line 12 extend from the opening 9, specifically in the same direction. It should be noted that the first weakening line 11 and the second weakening line 12 extend on a plane defined by the packaging blank, i.e., a plane parallel to the first axis F and the second axis G.

[0060] Specifically, the first weakening line 11 and the second weakening line 12 are opposite to each other.

[0061] Furthermore, the first weakening line 11 and the second weakening line 12 are parallel to each other and / or have the same length.

[0062] Preferably, both the first weakening line 11 and the second weakening line 12 are straight lines. This straight line shape allows a clearly defined edge to be obtained within the top wall 7 after the opening device 13 pierces through it, and achieves optimized interaction between the opening device 13 and the formed edge.

[0063] For more detailed explanation and specific reference Figure 2 As shown in Figure 4, the opening 9 bends at the first end 17 and the second end 18.

[0064] More specifically, opening 9 includes the edge 21 that defines opening 9 itself.

[0065] More specifically, edge 21 includes at least two curved segments 22 spaced apart from each other along a first axis F, and two linear segments 23 spaced apart from each other along a second axis G, the linear segments 23 being located between the curved segments 22, and particularly connected to the curved segments 22.

[0066] Advantageously, the depth of both the first weakening line 11 and the second weakening line 12 in the base layer 10 is less than the thickness of the base layer 10. This ensures the airtightness of the package 1 before it is first opened.

[0067] In other words, the base layer 10 is indented along the first weakening line 11 and the second weakening line 12.

[0068] This design allows the opening device 13 to be inserted into the packaging 1 efficiently.

[0069] Alternatively, the base layer 10 may be intermittently cut along each of the first weakening line 11 and the second weakening line 12. Such perforations allow the opening device 13 to be efficiently inserted into the package 1.

[0070] More detailed, and refer to Figure 2 Each package blank 2 includes: - The top region, having a top indentation pattern 24, is configured to define at least a top wall 7, and in particular also includes a flap 25 connected to the top wall 7; - A bottom region having a bottom embossing pattern 26 configured to define at least a bottom wall 6, and a flap connected to the bottom wall 6; and - The middle region, which has a middle indentation pattern 27, is configured to define the sidewalls 8.

[0071] Specifically, opening 9, first weakening line 11, and second weakening line 12 are disposed on the top region, particularly on a segment of the top region that defines a portion of the top wall 7 after the package 1 is formed. More specifically, opening 9, first weakening line 11, and second weakening line 12 are disposed on the lateral region of the top region.

[0072] Reference Figure 3 The top wall 7 includes multiple edges, particularly a front edge 28, a rear edge 29 spaced apart from the front edge 28, and two side edges 30 located between and connected to the front edge 28 and the rear edge 29.

[0073] The top indentation pattern 24 includes a plurality of indentation lines 31, which are configured to define the edges of the top wall 7.

[0074] Advantageously, the first weakening line 11 and the second weakening line 12 are not intersected by any indentation lines. Furthermore, there are no indentation lines sandwiched between the first weakening line 11 and the second weakening line 12.

[0075] exist Figure 2 In the embodiment of the packaging blank 2 shown, the opening 9 is located near a crease line 31, which is configured to at least partially define the side edge 30 of the top wall 7.

[0076] For example, the first axis F is parallel to the corresponding crease line 31.

[0077] Furthermore, the first weakening line 11 and the second weakening line 12 protrude outward from their respective crease lines 31; more specifically, the opening 9 is located between the respective crease lines 31 and the first weakening line 11 and the second weakening line 12.

[0078] Advantageously, the first weakening line 11 and the second weakening line 12 are parallel to one or more crease lines of the top crease pattern 24, particularly parallel to the crease lines defining the front edge 28 and / or the rear edge 29.

[0079] In addition, Figure 3 In the embodiment of the package 1 shown, the opening 9 is located near a portion of the respective side edge 30. Additionally, the first weakening line 11 and the second weakening line 12 protrude outwards from their respective side edges 30, particularly toward the imaginary center line of the top wall 7 and / or the region 32 of the longitudinal sealing portion of the package 1.

[0080] More specifically, the opening 9 is located between the corresponding side edge 30 (on one side) and the first weakening line 11 and the second weakening line 12 (on the other side).

[0081] More specifically, the opening 9 and the first weakening line 11 and the second weakening line 12 are located between their respective side edges 30 and the section 32 of the longitudinal sealing portion.

[0082] In addition, the opening 9, the separator 10, the first weakening line 11 and the second weakening line 12 are located between the rear edge 29 and the transverse seal 33 of the top wall 7.

[0083] For example, the first axis F is parallel to the corresponding side edge 30.

[0084] Preferably, the first weakening line 11 and the second weakening line 12 are parallel to at least one edge of the top wall 7, particularly to the front edge 28 and / or the rear edge 29.

[0085] Reference Figures 4A to 4C This explains the interaction between the opening device 13 and the opening 9, the separating membrane 10, the first weakening line 11, and the second weakening line 12.

[0086] The user moves the opening device 13 toward the opening 9 and brings the cutting portion 34 of the opening device 13 into contact with the separating film 10. By pushing the opening device 13 toward the interior space of the package 1, the cutting portion 34 causes the separating film 10 to rupture, and subsequently the other active edges 35 of the opening device 13 cause the packaging material to break along the first weakening line 11 and the second weakening line 12.

[0087] Subsequently, the opening device 13 is located inside the packaging 1 and is fixed to the packaging 1 by interacting with the boundary edge of the integral hole formed during the rupture of the separator film 10 and the breakage of the packaging material along the first weakening line 11 and the second weakening line 12.

[0088] Reference Figure 6The numeral 1' indicates packaging of an alternative embodiment of the present invention; since packaging 1' is similar to packaging 1, the following description is limited to the differences between the two, and the same reference numerals are used for the same or corresponding parts where possible.

[0089] Specifically, with Figure 3 Compared to the embodiment shown, the difference between package 1' and package 1 is that the opening 9 is adjacent to the other edge 30 of the top wall 7.

[0090] Reference Figure 5 The number 2' indicates a packaging blank of an alternative embodiment of the present invention; since packaging blank 2' is similar to packaging blank 2, the following description is limited to the differences between them, and the same reference numerals are used for the same or corresponding parts where possible.

[0091] The packaging blank 2' is designed to be used to form packaging 1'.

[0092] The difference between packaging blank 2' and packaging blank 2 is that the opening 9 is set adjacent to another crease line 31, which is configured to at least partially define the other side edge 30 of packaging 2'.

[0093] Reference Figure 8 The number 1'' indicates a package of an alternative embodiment of the present invention; since package 1'' is similar to package 1, the following description is limited to the differences between the two, and the same reference numerals are used for the same or corresponding parts where possible.

[0094] Specifically, the difference between package 1'' and package 1 is that the opening 9 is adjacent to the front edge 28.

[0095] In addition, the first weakening line 11 and the second weakening line 12 extend toward the lateral seal 33 of the package 2''.

[0096] Additionally, the opening 9, the separator 10, the first weakening line 11, and the second weakening line 12 are located between the transverse seal 33 and the front edge 28.

[0097] In addition, the first axis F is parallel to the front edge 28.

[0098] Alternatively, the first weakening line 11 and the second weakening line 12 are parallel to one or more side edges 30.

[0099] Reference Figure 7 The number 2'' indicates a packaging blank of an alternative embodiment of the present invention; since packaging blank 2'' is similar to packaging blank 2, the following description is limited to the differences between them, and the same reference numerals are used for the same or corresponding parts where possible.

[0100] The packaging blank 2'' is designed to be used to form packaging 1''.

[0101] The difference between packaging blank 2'' and packaging blank 2 is that the opening 9 is set adjacent to the indentation line 31 that defines the front edge 28 of packaging 1''.

[0102] In addition, the opening 9, the separator 10, the first weakening line 11, and the second weakening line 12 are all arranged in the central region of the top region.

[0103] In addition, the first axis F is parallel to the indentation line 31 that defines the front edge 28.

[0104] Alternatively, the first weakening line 11 and the second weakening line 12 are parallel to one or more crease lines defining the corresponding one or more side edges 30.

[0105] Reference Figure 10 The number 1''' indicates a package of an alternative embodiment of the present invention; since package 1''' is similar to package 1, the following description is limited to the differences between them, and where possible, the same reference numerals are used for the same or corresponding parts.

[0106] Specifically, the difference between package 1''' and package 1 is that the opening 9 is adjacent to a portion of a corresponding side edge 30, but located between the transverse seal 33 and the front edge 28.

[0107] Reference Figure 9 The number 2''' indicates a packaging blank of an alternative embodiment of the present invention; since packaging blank 2''' is similar to packaging blank 2, the following description is limited to the differences between the two, and the same reference numerals are used for the same or corresponding parts where possible.

[0108] The packaging blank 2''' is designed to be used to form packaging 1'''.

[0109] The difference between packaging blank 2''' and packaging blank 2 is that the opening 9, the separator film 10, the first weakening line 11 and the second weakening line 12 are all arranged in the central area of ​​the top area.

[0110] The advantages of the packaging 1, 1', 1'' and 1''' and / or packaging blanks 2, 2', 2'' and 2''' according to the present invention are clearly apparent from the above description.

[0111] In particular, the applicant observed that the evacuation effect of packages 1, 1', 1'', and 1''' can be improved by using opening 9, the first weakening line 11, and the second weakening line 12. Furthermore, thanks to the shape of opening 9, the first weakening line 11, and the second weakening line 12, the reusable opening device 13 can fit tightly against the packaging material, thereby preventing liquid leakage along the packaging material during pouring.

[0112] Obviously, modifications can be made to the packaging 1, 1', 1'' and 1''' and / or packaging blanks 2, 2', 2'' and 2''' described herein, but such modifications do not exceed the scope of protection defined by the appended claims.

Claims

1. A packaging blank (2, 2', 2'', 2''') for producing a pourable sealed package (1, 1', 1'', 1'''), said packaging material (2, 2', 2'', 2''') comprising: - At least one base layer for providing rigidity (3); - Multiple laminates (4) are applied to the base layer (3) and cover both sides thereof; - An opening (9) is formed by a through groove provided in the base layer (3); - A separator (10) covering the opening (9); and The opening (9) extends along the first axis (F) and the second axis (G) perpendicular to the first axis (F); Wherein, the first extension length (E1) of the opening (9) along the first axis (F) is greater than the second extension length (E2) along the second axis (G); The opening (9) includes a first end (17) and a second end (18) spaced apart from each other along the first axis (F); - First weakening line (11); and - Second weakening line (12); Each of the first weakening line (11) and the second weakening line (12) includes a corresponding first terminal portion (19, 19') and a corresponding second terminal portion (20, 20') opposite to the first terminal portion (19, 19'); The first terminal portion (19, 19') of the first weakening line (11) is disposed near the first end (17), and the first terminal portion (19, 19') of the second weakening line (12) is disposed near the second end (18). The first weakening line (11) and the second weakening line (12) both extend outward from the opening (9).

2. The packaging blank (2, 2', 2'', 2''') according to claim 1, wherein the first weakening line (11) and the second weakening line (12) are parallel to each other.

3. The packaging blank (2, 2', 2'', 2''') according to claim 2, wherein the first weakening line (11) and the second weakening line (12) are parallel to the second axis (G).

4. The packaging blank (2, 2', 2'', 2''') according to any of the preceding claims, wherein the first weakening line (11) and the second weakening line (12) are both straight and / or have the same length.

5. The packaging blank (2, 2', 2'', 2''') according to any of the preceding claims, wherein the opening (9) is bent at the first end (17) and the second end (18).

6. The packaging blank (2, 2', 2'', 2''') according to claim 5, wherein the opening (9) includes an edge (21) defining the opening (9) itself; in, The edge (21) includes at least two curved segments (22) spaced apart from each other along the first axis (F), and two linear segments (23) spaced apart from each other along the second axis (G) and located between the two curved segments (22); Each linear segment (23) is connected to each of the two curved segments (22).

7. The packaging blank (2, 2', 2'', 2''') according to any one of the preceding claims, wherein, The depth of each of the first weakening line (11) and the second weakening line (12) in the base layer (3) is less than the thickness of the base layer (3), and / or the base layer (3) is intermittently cut along each of the first weakening line (11) and the second weakening line (12), and / or the base layer (3) is indented along the first weakening line (11) and the second weakening line (12).

8. The packaging blank (2, 2', 2'', 2''') according to any of the preceding claims, wherein the opening (9) is symmetrical with respect to an axis of symmetry parallel to the first axis (F).

9. The packaging blank (2, 2', 2'', 2''') according to any of the preceding claims, wherein the separator film (10) comprises portions of one or more of the laminated layers (4).

10. A package for a pourable product, formed by folding and sealing the packaging material (2, 2', 2'', 2''') as described in any of the preceding claims, and configured to accommodate an opening device (13) for pouring the pourable food, wherein, The separator (10) is configured to be ruptured by the opening device (13), and the packaging material is configured to rupture along the first weakening line (11) and the second weakening line (12) by applying pressure to the packaging material with the opening device (13).

11. A package (1, 1', 1'', 1''') for a pourable product, made of multiple layers of packaging material; the package (1, 1', 1'', 1''') includes a bottom wall (6) and a top wall (7) spaced apart from each other along a longitudinal axis (A) of the package (1, 1', 1'', 1'''), and a side wall (8) located between the top wall (7) and the bottom wall (6); in, The top wall (6) includes: - Opening (9); and - A separator (10) that covers the opening (9); The opening (9) extends along the first axis (F) and the second axis (G) perpendicular to the first axis (F); Wherein, the first extension length of the opening (9) along the first axis (F) is greater than the second extension length along the second axis (G); - First weakening line (11); and - Second weakening line (12); The opening (9) includes a first end (17) and a second end (18) spaced apart from each other along the first axis (F); Each of the first weakening line (11) and the second weakening line (12) includes a corresponding first terminal portion (19, 19') and a corresponding second terminal portion (20, 20') opposite to the first terminal portion (19, 19'); The first terminal portion (19, 19') of the first weakening line (11) is disposed near the first end (17), and the first terminal portion (19, 19') of the second weakening line (12) is disposed near the second end (18). The first weakening line (11) and the second weakening line (12) both extend outward from the opening (9).

12. The packaging (1, 1', 1'', 1''') according to claim 11, wherein the first weakening line (11) and the second weakening line (12) are parallel to each other and / or have the same length, and / or the first weakening line (11) and the second weakening line (12) are both straight.

13. The packaging (1, 1', 1'', 1''') according to claim 11 or 12, wherein the opening (9) is bent at the first end (17) and the second end (18).

14. The packaging (1, 1', 1'', 1''') according to any one of claims 11 to 13, wherein the depth of the first weakening line (11) and the second weakening line (12) in the base layer (3) is less than the thickness of the base layer (3), and / or the base layer (3) is intermittently cut along each of the first weakening line (11) and the second weakening line (12), and / or the base layer (3) is indented along the first weakening line (11) and the second weakening line (12).

15. The packaging (1, 1', 1'', 1''') according to any one of claims 11 to 14, wherein the opening (9) is symmetrical with respect to an axis of symmetry parallel to the first axis (F) and / or the second axis (G).

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